Display processor system and method

Details Display processor system and method Display processor system and method

1983-05-03

1985-07-23

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358230, 358298, 340793, H04N 312, H04N 566, H04N 122

Patent

active

045311609

ABSTRACT:
A technique for reproducing an image in a set of grey scale steps is disclosed including: providing a plurality of superpixels for providing an output representative of an image; providing a set of threshold levels for each pixel in a superpixel, which set is different from each of the sets of threshold levels of the other pixels in that superpixel and different from the set of greyscale steps; identifying the position of a given pixel in a superpixel and designating a particular set of threshold levels corresponding to the position of that given pixel; comparing the output of the given pixel with its particular set of threshold levels; and indicating the greyscale step in the set of greyscale steps in response to the output of the given pixel equal to or in excess of at least one of the threshold levels in the set of threshold levels corresponding to that pixel position.

REFERENCES:
patent: 3937878 (1976-02-01), Judice
patent: 3959583 (1976-05-01), Judice et al.
patent: 3997719 (1976-12-01), Judice
patent: 4258393 (1981-03-01), Ejiri et al.
D. R. Thompson, Digital Halftone Method for Matrix Displays, IBM Technical Disclosure Bulletin, vol. 20, No. 1 (Jun. 1977).

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